Make a claim about copper and silver based on their position relative to each other

If by position, you mean in the Periodic table, and you are looking into the properties of the elements, the answer is "not a whole lot", as these are transition metals.

Explanation:

Unlike the main group elements (columns 1-2 and 13-18) where each column shows a family of elements with a different number of valence electrons, the transition metals differ in the number of d-electrons found in the electron shell that is just below the current valence shell for elements in that row. This causes the transition metals to show only minor variations in properties across a row, and makes attempts at finding similarities between elements in the same column a bit frustrating!

That said, it is true that silver and copper are two of the best metallic conductors of all metals (along with gold), and this can be somewhat attributed to there electron configurations, but you sure aren't looking at something like the halogens here!

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant.